Very simple to print, realistic feeling masterbator. Print the shell file with flat side on bed, use supports. The base of the shell should be removed so that it is open from both ends, one end fits on the core, the other side is used for pouring the silicone rubber Smooth the core part after printing, seal and spray with glossy spray paint. Use mold release on the core Recommended silicone hardness of 3A or less, the lower the hardness the better The shell should be cut off after the silicone pour.